TEHRAN, July 10 (Xinhua) -- The U.S. government has imposed sanctions on a Malaysia-based Iranian travel agency to tighten its pressure on the Islamic republic, Press TV reported Tuesday.

As a result of the sanctions, "all property and interests of Mahan Travel and Tourism Sdn Bhd that are or come within U.S. jurisdiction are blocked," the report quoted the U.S. Treasury Department as saying in a statement.

U.S. President Donald Trump, who announced the U.S. pullout from the 2015 Iranian nuclear agreement in May, has vowed to unleash "the strongest sanctions in history" on Iran if the latter dose not change behavior.

The first unilateral U.S. sanctions on Iran's automotive sector, gold trade, and other industries are expected to be re-imposed on August 4.

Further sanctions on oil and transactions with the Central Bank of Iran will come into effect on Nov. 6.

Trump has given companies 180 days to wind down their businesses in Iran or face sanctions by the United States.

On Saturday, Dutch airline KLM said it had decided to suspend its direct flights to Tehran "for commercial reasons."

"As a result of the negative results and financial outlook for the Tehran operation, the last flight will take off from Amsterdam on Sept. 22, 2018 and return to the Schiphol Airport on Sept. 23," it said in a short statement.

KLM resumed flights to Tehran in 2016 when the landmark Iranian nuclear agreement signed between Iran and six world powers came into effect.

Also, Austrian Airlines announced on Friday that it would stop service to the Iranian cities of Isfahan and Shiraz from September, but will continue its flights to Tehran.